Nitrogen biological immobilization

The biological immobilization is a conversion of mineral nitrogen, in which it is bound into organic structures. It occurs as a result of the assimilation of mineral nitrogen by plants and by the rich microflora. The immobilization by plants is the most important form of nitrogen immobilization. 

In this chapter we review our current understanding with respect to carbon (C) and nitrogen (N) dynamics, the chemistry and biology of the rhizosphere, and aspects of immobilization and mineralization specific to the rhizosphere. Carbon... 

The basic requirement for nitrogen immobilization by microorganisms is the presence and biological decomposition of organic matter with a low nitrogen content or with a high C N ratio. Under these conditions, the mi-... 

Breland, T.A. and Bakken, L.R. (1991) Microbial growth and nitrogen immobilization in the root zone of barley (Hordeum vulgare L.), Italian ryegrass (Loiium muitifiorum Lam.), and white clover Trifolium repens L.). Biology and Fertility of Soils 12,1 54-1 60. 

Accompanying the release of carbon there also occurs a release of nitrogen as ammonia, as well as other mineral elements present. A portion of this ammonia may be immobilized biologically, may be sorbed by the organic and inorganic colloids present, or may be fixed chemically by the clays or organic matter present. However, the major portion of the nitrogen is normally oxidized to nitrites and nitrates. The various pro-... 

Primary metabolite Immobilized organelle first step in biophotolysis of water Immobilized algal cells Biological nitrogen fixation Antibiotic synthesis secondary metabolite Concentration of plutonium from waste waters (bioadsorption)... 

---